(458a) Sorption of Organic Acids on Weak-Base Anion Exchange Resins with Different Basicities
AIChE Annual Meeting
2017
2017 Annual Meeting
Separations Division
Adsorption Applications for Sustainable Energy and Chemicals
Wednesday, November 1, 2017 - 8:00am to 8:18am
Ion exchange using weak-base anion exchange resins has proven to be an economic and efficient method for the separation of organic acids. In this research, the uptakes of acetic and lactic acids on several resins of different basicities were studied. Experiments were conducted at different pH values to determine the effects of the pH of the solution, pKa of the acid, and the pKa of the resin on acid sorption from pure solutions, mixtures of lactic and acetic acids, and from fermentation broths. The resins studied include Reillex 425 and a more basic resin Purolite A835. Sorption data for pH range from 2 to 10 for lactic and acetic acids along with equilibrium models and mechanistic analysis of resin basicity will be presented.